Electric heater



A. E. HASSELBACH ELECTRIC HEATER Fil ed Dec. :50. 1920 INVENTOR. 12:22??? z s zsaa M a ATTQRNEY.

m nta 0e. 1e; 192a To allwhomitmoy STATES UNITED PATENT 'orrlcs.

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hen aiea December concern; Be it known that I, Amna'r E. HASBEL- nacn, citizen of the United States, residing and exact description of the same, such as insulating space between its walls, formed.

other. Before these cones are 'will enable others skilled in the art to which itpertains to make and use the same, reference being had to the accompanyi drawin which form a art of this speci cation. y invention re tes to electric heaters and has for its object the heating of water to produce steam almost instantly to be used in cooking or other similar purposes. 4

In the accompanying drawing Figure 1 shows a section of an apparatus embodying m invention and a vessel of water in whic it is placed in operative position. v

Fig. 2 is a detailed section of a part of said apparatus.

Fig 3 is an elevationof a part of the inner cone showing also. in section, the bottom of the containing1 vessel.

Fig. 4 is a view similar to Fig. 1 showing a modification.

:0 is the containing vessel in which there is a quantity ofwater up to the level as.

b is a heat cone consisting of two sheets of suitab metal formed into the shape of cones, one fitting closely over the placed together a helical groove, semi-clrcular in cross-section, is formed in the outer surface of the inner cone and a corresponding ve is formed in the inner surface of t e outer cone. An electrical heating wire 0' covered with rcelain heads 0' is wound in the groove in the inner cone before placing the two cones together and this wire with the insulating beads is enclosed in the approximately circular aperture formed by the two semicircular helical grooves as shown most distinctly in 2, and indicated by the reference character b. formed the wall composed are" of the cone b.

- by welding at a to permit the access of water to its in b" indicates apertures "of which said cone is- "of aid aper-t 80, 1.90. Serial No. 484,008.

terior and having an aperture a at top to permit the circulation of water. The

cone 0 is co-axialwith the cone 6 its outer wall is spaced a short distance from the inner wall of the cone 1;.

d is an outer cone co-axial with the cones a and b and having double walls d kl enclosing a heat insulating chamber between them. d indicates apertures to permit the access of water under the lower edge of the cone 0!.

In Fi 4. I have substituted for the cone b a 00' 12 containing heating conductors covered with material for excluding water.

and insulating said conductors. c indi-' cates the leading in strand. The spires of said coil are spaced from each other to permit free circulation of water.

e is an annular space extending upward from the upper end of the conical space between the inner cone a and the outer cone :1.

The operation of the above described dea vice is as follows:

The apparatus is laced in a vessel con? taining water as in icated in Fig. 1. ,The water extends into the space between the inner cone a and the outer cone d and comes in contact with the inner and outer surface of the cone 6. The water also flows into the conical s ace inside of the cone a.

The e ectric current is then turned on' which heats the walls of the cone b and this heat is. immediately imparted to the thin layer of water opposite the inner and outer, surface of the cone 1) and steam is thus produced passing up the conical p c. This may be used for any purpose required. There is free circulation of water through the apertures b and any steam formed within the wall of the cone 6 may pass freely through said a rtures.

The above describe device may be easily and cheaply constructed, presents a large surface to the water to be heated and permits a free circulation of the water around its heating surface and limits the quantity of water be' heated. at one time. The porcelain bea :wire and outer wall of'the inner portion of may be strung upon the a the wire laid in the groove in the the "cone b and the outer wall admsted 'to-placeand ,f' construction is strong, permanent and '1. A element ot-two .fixed with very little-trouble and a resultwalls of sheet metal conducting wires interposed between said walls, the metal of said walls being welded together between said wires.

2. A heating element consisting of two walls of sheet metal conducting wires interposed between said walls, the metal of said walls being welded together between said wires, said element being provided with perforatlons through its walls between said wires.

3. The combination of a vessel containing water, a heating element consisting of two concentric walls, each of which is continuous, so formed as to leave a laterally narrow space between said walls and a heating element in the space between said walls.

4. The process of making a heating element consisting in forming a groove in the outer surface of a piece of sheet metal, placingthe heat producing conductor in said groove, placing a second sheet of metal with its surface against the surface of the first sheet so as to cover said grooves and enclose said conductor.

5. The process of producing a heating element consisting in forming a cone of sheet metal with a groove in its surface forming a second corresponding cone of sheet metal,

placing a conductor in said groove and welding said conestogether so as to enclose said conductor.

6. The process of making a heating element consisting in forming a groove in the surface of a piece of sheet metal, threading insulating beads upon a conducting wire,

placing said wire with thebead-s thereon in said groove, placing a second sheet of ma terial againstthe first sheet of material so as to enclose said conductor in said groove and'securing said sheets together.

7. The combination of a conicalwall, a

second conical wall coaxial with the first conical wall, the two walls being so formed so as to leave a space between them, a conical heating element in the space between said wall, said element being provided with aperturlelsextending transversely through its wa 8 A heating element consisting of two sheets of suitable material, heating wires disposed between said sheets, said shects being joined together intermediate of said wires, said element being provided with perforations through its wall between said wires.

Intestimony whereof, I sign this specification.

ALBERT E. HASSELBACH 

